<div>
  <subject-box class="subject-box"></subject-box>
  
  <div class="box-footer center-block">
    <div class="center-block">
      <a class="btn" ng-click="uploadSubject()">发布</a>
      <a class="btn blue" ng-click="previewSubject()">预览</a>
      <a href="javascript:" ng-click="prevStep()" style="float: left;">返回上一步</a>
    </div>
  </div>
</div>